US4554612A - AC Metallized film capacitor - Google Patents
AC Metallized film capacitor Download PDFInfo
- Publication number
- US4554612A US4554612A US06/637,995 US63799584A US4554612A US 4554612 A US4554612 A US 4554612A US 63799584 A US63799584 A US 63799584A US 4554612 A US4554612 A US 4554612A
- Authority
- US
- United States
- Prior art keywords
- section
- spacer
- capacitor according
- tab
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 25
- 239000011104 metalized film Substances 0.000 title abstract description 5
- 125000006850 spacer group Chemical group 0.000 claims abstract description 44
- 239000002184 metal Substances 0.000 claims abstract description 6
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 2
- -1 polypropylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/224—Housing; Encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/12—Protection against corrosion
Definitions
- This invention concerns an AC metallized film capacitor which has a unitary spacer which isolates the rolled capacitor section from a metal housing and the electrode tabs from each other and the housing.
- the spacer is mainly rectangular in shape and is wider than the section is tall.
- the spacer is wrapped around the section and overlaps.
- a tab from the bottom of the section passes between the overlapped portion isolating it from the section and a housing.
- the edge of the spacer having a cutout is folded over the bottom of the section and sealed, and the extension or flap is folded over the top of the section.
- Spacers which encompass a capacitor section and isolate it from a housing are well known. Such spacers may be in the form of a sleeve which is crimped at both ends, a pouch which also acts as a housing, or a multiwrap arrangement. When a tab extends from the bottom of a unit along its side, the tab is frequently sleeved to isolate it from the section and the housing.
- This invention features an AC metallized film capacitor utilizing a unitary spacer which replaces multipiece wraps and sleeves.
- the spacer is mainly rectangular in shape and is wider than the capacitor section is tall so that it extends beyond the ends of the section when wrapped about it. It is also longer than the circumference of the section so that there is an overlap.
- the spacer has a rectangular extension or flap near the end of the long edges which eventually is folded over one end of the section. There is a cutout opposite the centerline of the flap on the other long edge for a tab from the other end of the section, the bottom, to pass between the overlapped portion of the spacer along the side of the section.
- the bottom edges of the spacer are pressed together and sealed. Alternately, they may be folded over and sealed to the end of the section.
- the section can be wrapped using automated equipment with the tab passing between the first turns of the spacer through the cutout.
- the outer edge of the overlap may be sealed to the adjacent layer underneath if desired.
- the ends of the spacer with the cutout can be gathered and sealed after the wrapping of the spacer while the flap is folded over the top end of the section.
- the tabs are ultimately connected to terminals located in a cover in a known manner after which the unit is inserted into a metal housing, and the cover is sealed to the housing.
- the section may be impregnated with a dielectric fluid if desired.
- FIG. 1 shows an embodiment of the spacer of the present invention unrolled.
- FIG. 2 shows a different embodiment of the spacer unrolled.
- FIG. 3 shows the spacer assembled around the section.
- FIGS. 4 and 5 show two embodiments of the bottom seal.
- An AC metallized film capacitor which is to be encased in a metal housing has a unitary spacer which isolates the section and electrode tabs from the housing.
- spacer 10 is generally rectangular in shape with a rectangular extension or flap 11 near one end of a long side. Opposite the centerline of extension 11 on the other long side is a cutout 12 (FIG. 1) in the form of a slot or a rectangular cutout 13 (FIG. 2).
- a capacitor section 20 is placed against the short edge of spacer 10 adjacent extension 11.
- a long electrode tab 21 (shown in FIG. 3) passes through slot 12 or cutout 13 behind spacer 10 which is then wrapped around the section 20 enclosing tab 21 in its layers.
- One edge of spacer 10 extends beyond the bottom of capacitor section 20 and is pressed together and sealed, preferably ultrasonically although a heat seal may be used. Seal 14 is shown in FIG. 5. Alternatively, these edges may be folded and sealed to the bottom of section 20 at core 23 as is shown in FIG. 4.
- the spacer 10 may be made of a number of insulating plastics known in the capacitor industry but is preferably polypropylene for economic reasons.
- the one piece spacer 10 replaces at least four separate insulating pieces: a top piece a bottom piece, a sleeve for insulating electrode tab 21 from the unit and the housing, and a main body wrap. Not only does the present invention reduce the number of pieces in inventory, but the present spacer eliminates the step of separately sleeving an electrode tab.
- the present spacer is also designed for automated assembling in that it can easily be automatically slipped between the section and the long tab and wrapped around the section.
- the bottom edge, and side edge if desired, can be sealed, the top is folded over, and the assembly inserted into a housing, also automatically and at greater speed than by hand.
Abstract
Description
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/637,995 US4554612A (en) | 1984-08-06 | 1984-08-06 | AC Metallized film capacitor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/637,995 US4554612A (en) | 1984-08-06 | 1984-08-06 | AC Metallized film capacitor |
Publications (1)
Publication Number | Publication Date |
---|---|
US4554612A true US4554612A (en) | 1985-11-19 |
Family
ID=24558216
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/637,995 Expired - Fee Related US4554612A (en) | 1984-08-06 | 1984-08-06 | AC Metallized film capacitor |
Country Status (1)
Country | Link |
---|---|
US (1) | US4554612A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6687115B2 (en) | 2001-09-07 | 2004-02-03 | Dearborn Electronics, Inc | Film capacitor for high temperature applications |
EP1468703A1 (en) * | 2003-04-15 | 2004-10-20 | Depuy Products, Inc. | Implantable orthopaedic device |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2549770A (en) * | 1946-11-23 | 1951-04-24 | Sprague Electric Co | Electrical condenser |
US2647224A (en) * | 1950-12-02 | 1953-07-28 | Specialties Inc | Means and method for assembling electric circuit components |
US2751665A (en) * | 1951-04-16 | 1956-06-26 | Int Standard Electric Corp | Method of mounting an electric condenser or other electric components in a metal case |
US3204164A (en) * | 1961-06-21 | 1965-08-31 | Sprague Electric Co | Encased electrical capacitor |
US3236936A (en) * | 1962-07-30 | 1966-02-22 | Corneil Dubilier Electric Corp | Miniature electrical component with protected terminal-wire connections |
US3265945A (en) * | 1964-10-27 | 1966-08-09 | Sprague Electric Co | Packaged capacitor and method of making the same |
US3283225A (en) * | 1965-04-27 | 1966-11-01 | Aerovox Corp | Electric capacitor |
US4313084A (en) * | 1978-03-27 | 1982-01-26 | Nippon Electric Co., Ltd. | Laminated structure of double-layer capacitor |
-
1984
- 1984-08-06 US US06/637,995 patent/US4554612A/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2549770A (en) * | 1946-11-23 | 1951-04-24 | Sprague Electric Co | Electrical condenser |
US2647224A (en) * | 1950-12-02 | 1953-07-28 | Specialties Inc | Means and method for assembling electric circuit components |
US2751665A (en) * | 1951-04-16 | 1956-06-26 | Int Standard Electric Corp | Method of mounting an electric condenser or other electric components in a metal case |
US3204164A (en) * | 1961-06-21 | 1965-08-31 | Sprague Electric Co | Encased electrical capacitor |
US3236936A (en) * | 1962-07-30 | 1966-02-22 | Corneil Dubilier Electric Corp | Miniature electrical component with protected terminal-wire connections |
US3265945A (en) * | 1964-10-27 | 1966-08-09 | Sprague Electric Co | Packaged capacitor and method of making the same |
US3283225A (en) * | 1965-04-27 | 1966-11-01 | Aerovox Corp | Electric capacitor |
US4313084A (en) * | 1978-03-27 | 1982-01-26 | Nippon Electric Co., Ltd. | Laminated structure of double-layer capacitor |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6687115B2 (en) | 2001-09-07 | 2004-02-03 | Dearborn Electronics, Inc | Film capacitor for high temperature applications |
EP1468703A1 (en) * | 2003-04-15 | 2004-10-20 | Depuy Products, Inc. | Implantable orthopaedic device |
US20040210316A1 (en) * | 2003-04-15 | 2004-10-21 | Richard King | Implantable orthopaedic device and method for making the same |
US7938861B2 (en) | 2003-04-15 | 2011-05-10 | Depuy Products, Inc. | Implantable orthopaedic device and method for making the same |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SPRAGUE ELECTRIC COMPANY NORTH ADAMS MASSACHUSETTS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CHILDS, JOHN J.;REEL/FRAME:004439/0983 Effective date: 19840822 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
AS | Assignment |
Owner name: DEARBORN ELECTRONICS INC., FLORIDA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SPRAGUE ELECTRIC COMPANY, A MA CORP.;REEL/FRAME:006223/0004 Effective date: 19920805 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19930912 |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |